Elevator-gate



ELEVATOR GATE.

Patented July 4, 1893.

G. LAGERQ-UIST & A. NELSON.

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UNITED STATES PATENT OFFICE.

GUST LAGERQUIST AND ANDREW G. NELSON, OF MINNEAPOLIS, MINNESOTA.

ELEVATOR-GATE.

SPECIFICATION forming part of Letters Patent No. 500,586, dated July 4, 1893.

Application filed February 28, 1893- Serial No. 464.056. (No model.)

To all whom it may cnce'rn.-'

Be it known that we, GUST LAGERQUIST and ANDREW G. NELsoN, both of Minneapolis;in the county of Hennepin, State of Minnesota, have invented certain new and useful Improvements in Elevator-Gates, of which the following is a specification.

Our invention relates to means for barring the passage-way into elevator shafts and for automatically lifting the bar or gate as the elevator-car arrives at the floor level.

The object which We have in view is to simplify the construction and operation of elevator gates and render their operation entirely automatic and reliable.

Our invention consists in general in the constructions and combinations all as hereinafter described and particularly pointed out in the claim and will be more readily understood by reference to the accompanying drawings, forming part of this specification, in which Figure 1 is a perspective view showing an elevator shaft and elevator and an automatic gate therefor. Fig. 2 is an enlarged plan view showing the means for raising the gate. Fig. 3 is a sectional view thereof on the line x-ac of Fig. 2. i

As shown in the drawings, 2 represents the car floor, and 3 the raised timbers and side pieces, which side pieces operate upon the vertical guides 4 in the elevator shaft. The opening 5 through the floor is shown and this opening is ordinarily inclosed upon the sides and one end. Any suitable means may be provided for raising and lowering the elevator-car. Upon one of the side timbers or standards 3 of the car we provide the bracket 6 having the upper and lower inclined edges and the outer vertical edge 7. Between the guide 4 and the corner post 8 of the elevator shaft we arrange the horizontal guides 9 for the cross head 10, which cross head is provided with a shaft upon which are loosely journaled two or more sheaves 11. The cross head also bears the stud 12 preferably an extension of the first mentioned shaft and upon this stud is arranged a smooth faced pulley 13 in line to be engaged by the bracket 6 as the elevator car is raised or lowered. Between the inner ends of the guides 9 we provide boxes 14 having shafts 15 whereon are grooved sheaves 16 corresponding to those numbered 11. A single rope 17 having its end 18 fastened upon the cross head extends about successive sheaves 16 and 11 and finally passing from the outside sheave 11 is carried up over the idler pulleys 20 and thence across a centrally arranged pulley 21 from whence the end 21 of the rope extends down to an attachment 22 on the middle of the cross bar or gate 23. This gate 23 operates vertically in slides or guides 24: arranged upon the inner ends of the posts 8 and 26 and it will be seen that as the car is raised from the position shown in the drawings the weight of the gate acting through the several sheaves will cause the pulley 13 to follow back upon the face or lower edge of the bracket 6, the result being that the gate is lowered and the pulley 11 with the cross head returned to a point close up to the innor sheaves 16. When the elevator is reversed and descending, the upwardlyinclined lower edge of the bracket 6 will strike upon the pulley 13 and the pulley and cross head will be forced outwardly. The flat face 7 upon the bracket is so arranged that the pulley 13 will stand thereon and hold the gate open when the floor of the car is on a level with the floor 5. As the car continues to descend the gate will be lowered by the pulley and the cross head moving inwardlyupon the inclined upper face of the bracket.

Having thus described our invention, We claim as new and desire to secure by Letters Patent The combination, with an elevator car, shaft, and vertical guides, of a bracket 6 arranged upon said car and having upper and lower inclined edges and the outer vertical edge 7, the guides 9, sheaves arranged within the inner edges thereof, a cross-head to operate in said guides, sheavescarried on said cross-head,a pulley carried on said cross head in position to be engaged by said bracket 6, a rope having one fixed end and wound about the stationary and the cross head sheaves, the other end of said rope passing upwardly and thence downwardly over a suitable pulley to a vertically movable gate or bar, whereto the upper end. of said rope is attached, substantially as and for the purpose set forth.

In testimony whereof Witness our hands this th day of February, A. D. 1893.

GUST LAGERQUIST. ANDREW G. NELSON. In presence of F. S. LYON, B. BOOTH. 

